Artist name:

To add an artist name to your track, go to the Metadata tab and enter the artist name under Artist:

You can also edit your tracks via your new Artist Studio page over here: https://soundcloud.com/artists. Just click the 3 dots next to the track in question, tap Edit and under Track details, you can add the Artist name:

Record Label and Release Date

If your track is released under a record label, with a specific release date you can add both of these to the track through the Metadata tab of your track's edit page. You can access your edit page at any time by going to the pencil icon below it's waveform:

You can also add the record label and release date via your Tracks page: https://soundcloud.com/artists. Click the three dots next to the track, select Edit, and under Advanced settings, you can add your track’s details (including Publisher, ISRC, Buy link).

Please note: The release date will be under the GMT time zone. This means that if you are outside of this time zone, the day may look different.